Aftermarket tire air pressure

I'm sure it varies but was wondering what pressure ya'll are running with aftermarket tires. I just had some Toyo OC AT III LT275/65/20 tires installed on Monday. The ride was a little more firm, as expected. I checked the pressure and it was over 60 pounds in each tire (My gauge only goes up to 60). I kicked the sidewall and it was like kicking concrete. The heaviest thing I tow is a 19ft Xpress aluminum boat. Probably don't need 60pounds do I?

 

Way too much around 40psi is good to run! Also check the door to see what it says too, not sure what the new 3rd gen specifies!

 

Use this to figure out new pressure

 

You can go to Toyo tires contact us page and submit a ticket asking for correct tire pressure. I did it when I went from OEM tire 265/60R20 to 35x12.50R18 D load range. I was told to run 32 psi as correct tire pressure but 35 psi is good too.

I tried using the tire size.com pressure calculator but it didn’t have the oem size.

 

I have those exact same tires/size. I run at 45 when it's warm because then they will stay between 45-50. I run them at 50 when it's cold out because they will drop down all the way to 42 overnight when it's really cold.

 

or you could read the sidewall and see what the max tire pressure is for that tire for the highest rated load for that tire.

something along the lines

max xx psi @ xxxx lbs

 

You don't need to run max pressure for what your hauling. I have some load range E all terrain tires that I run at 45 psi and they are wearing fine and ride good. They put 80 in them when they mounted them and it was noticeable. I went to 60 psi and found that 45 is the sweet spot for me.

 

I’ll run 35 to 40 psi. If you’re going off road you want 35 to 40, if you’re towing that’s when you have to air up to a highway psi. Depends what you’re hauling. Sweet spot is 35 to 40.

 

on the tundra i usually only run p rated duratracs at around 32-36 psi as we dont haul nothing but our fat a$$es 99% of the time.

on my 4runner i run p rated at 32 psi since its only me driving to/from work and it get parked thursday night until monday morning for work. i work 4x10's

 

Sooo much bad info in here….

@OP: no one call tell you what the best tire pressure is. Someone will say XX amount is best because their cousins boyfriends friends husband is a mechanic and that’s what he said. Only way to know for sure is to measure it for your truck. There’s really 2 options, maybe others but these are the most popular. Either the chalk test, which is the less scientific version. Or a pyrometer. If you use the chalk test, interco has a decent article here. It’s also all over every site and loads of YouTube vids. Effectively, you make a thick chalk line on your tire and keep adjusting pressure, either up or down, until you get full contact patch across the tread. The same is achieved with a pyrometer, but instead of wearing off chalk as you drive, you adjust pressure until the tire has a constant heat load across the tread. Then you’ve achieved your nominal pressure for that load and environment. This will vary truck to truck, and load to load. It will also vary winter to summer, as that pesky air tends to condense.

Having done this on a myriad of vehicles, the chalk test is cheap and effective. I also have a pyrometer that I’ve confirmed the chalk test too and it’s close enough to not be worth the cost of one.